Ignore certain scenarios so they are not counted as infra failures (#889)

* Ignore certain scenarios so they are not counted as infra failures

* Check to make sure request is not cancelled

src/Runner.Worker/ActionManager.cs

@@ -594,7 +594,7 @@ namespace GitHub.Runner.Worker
                     actionDownloadInfos = await jobServer.ResolveActionDownloadInfoAsync(executionContext.Global.Plan.ScopeIdentifier, executionContext.Global.Plan.PlanType, executionContext.Global.Plan.PlanId, new WebApi.ActionReferenceList { Actions = actionReferences }, executionContext.CancellationToken);
                     break;
                 }
-                catch (Exception ex)
+                catch (Exception ex) when (!executionContext.CancellationToken.IsCancellationRequested) // Do not retry if the run is canceled.
                 {
                     if (attempt < 3)
                     {
@@ -609,10 +609,21 @@ namespace GitHub.Runner.Worker
                     }
                     else
                     {
+                        // Some possible cases are:
+                        // * Repo is rate limited
+                        // * Repo or tag doesn't exist, or isn't public
+                        if (ex is WebApi.UnresolvableActionDownloadInfoException)
+                        {
+                            throw;
+                        }
+                        else
+                        {
+                            // This exception will be traced as an infrastructure failure
                             throw new WebApi.FailedToResolveActionDownloadInfoException("Failed to resolve action download info.", ex);
                         }
                     }
                 }
+            }
 
             ArgUtil.NotNull(actionDownloadInfos, nameof(actionDownloadInfos));
             ArgUtil.NotNull(actionDownloadInfos.Actions, nameof(actionDownloadInfos.Actions));

src/Sdk/DTWebApi/WebApi/Exceptions.cs

@@ -2459,6 +2459,25 @@ namespace GitHub.DistributedTask.WebApi
         }
     }
 
+    [Serializable]
+    public class UnresolvableActionDownloadInfoException : DistributedTaskException
+    {
+        public UnresolvableActionDownloadInfoException(String message)
+            : base(message)
+        {
+        }
+
+        public UnresolvableActionDownloadInfoException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        protected UnresolvableActionDownloadInfoException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
     [Serializable]
     public sealed class FailedToResolveActionDownloadInfoException : DistributedTaskException
     {